725662001 has 2 divisors, whose sum is σ = 725662002. Its totient is φ = 725662000.

The previous prime is 725661997. The next prime is 725662013. The reversal of 725662001 is 100266527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 523311376 + 202350625 = 22876^2 + 14225^2 .

It is a cyclic number.

It is not a de Polignac number, because 725662001 - 2² = 725661997 is a prime.

It is not a weakly prime, because it can be changed into another prime (725665001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362831000 + 362831001.

It is an arithmetic number, because the mean of its divisors is an integer number (362831001).

Almost surely, 2^725662001 is an apocalyptic number.

It is an amenable number.

725662001 is a deficient number, since it is larger than the sum of its proper divisors (1).

725662001 is an equidigital number, since it uses as much as digits as its factorization.

725662001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 725662001 is about 26938.1142806990. The cubic root of 725662001 is about 898.6242359018.

The spelling of 725662001 in words is "seven hundred twenty-five million, six hundred sixty-two thousand, one".